Adjustable sundial



FIG. 1 is a front perspective view of an adjustable sundial inaccordance with the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a right side view thereof.

The ornamental design for an adjustable sundial, as shown and described.